| 20501 | National Develop | | Oil & Gas Operator | Jan 1990 |
| 20502 | National Energy Exp Inc | Newark, OH 43055 | Oil & Gas Operator | Dec 2023 |
| 20503 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 20504 | National Exploration Company | | Oil & Gas Operator | Mar 1982 |
| 20505 | National Fuel Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Feb 2025 |
| 20506 | National Fuel Gas Supply Corporation | | Gas Operator | Dec 2010 |
| 20507 | National Investors Group | Warren, OH 44481 | Oil & Gas Operator | Nov 1996 |
| 20508 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 20509 | National Oil Com | | Oil & Gas Operator | Oct 1992 |
| 20510 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 20511 | National Oil Company (Ohio) The | Columbus, OH 43215 | Oil & Gas Operator | Sep 1999 |
| 20512 | National Onshore LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 20513 | National Petrole | | Oil & Gas Operator | Dec 1996 |
| 20514 | National Petroleum Reserves, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Apr 2012 |
| 20515 | National Pride Operating | Parker, CO 80134 | Oil & Gas Operator | Dec 2017 |
| 20516 | National Surface & Minerals, LLC | Addison, TX 75001 | Gas Operator | Jan 2023 |
| 20517 | National Treasure Mines | San Marina, CA 91118 | Oil Operator | Dec 1998 |
| 20518 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jan 2025 |
| 20519 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 20520 | Nativity Of Our Lord | Orchard Park, NY 14127 | Gas Operator | Dec 2023 |
| 20521 | Natl Fuel Gas Supply Corp | Williamsville, NY 14221-5887 | Oil & Gas Operator | Dec 2009 |
| 20522 | Natland Energy Corp | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 1996 |
| 20523 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 20524 | Natomas-McCormick-Coastal | | Oil & Gas Operator | Feb 1984 |
| 20525 | Natrona County Holdings LLC | Austin, TX 78701 | Oil & Gas Operator | Nov 2020 |
| 20526 | Natural Capital LLC | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2009 |
| 20527 | Natural Energy Dev Corp | Pittsburgh, PA 15241-1548 | Oil & Gas Operator | Dec 2018 |
| 20528 | Natural Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 1997 |
| 20529 | Natural Gas & Oi | | Gas Operator | Dec 1987 |
| 20530 | Natural Gas & Oil, Inc. | Fayette, AL 35555 | Oil & Gas Operator | Jan 2025 |
| 20531 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 20532 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 20533 | Natural Gas Compression Corp | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2025 |
| 20534 | Natural Gas Corp Of Ca | Vernal, UT 84078 | Oil & Gas Operator | Jun 1989 |
| 20535 | Natural Gas Corp Of California | Vernal, UT 84078 | Oil & Gas Operator | Dec 1989 |
| 20536 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 20537 | Natural Gas Expl | | Oil & Gas Operator | Jul 1990 |
| 20538 | Natural Gas MKTG. & Storage Co. | Houston, TX 77251 | Oil & Gas Operator | Sep 1996 |
| 20539 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 20540 | Natural Gas Pipeline Co Of Amer. | Houston, TX 77002 | Gas Operator | Jul 2008 |
| 20541 | Natural Gas Processing Company | Worland, WY 82401 | Oil & Gas Operator | Feb 2025 |
| 20542 | Natural Gas Resources Inc | Davenport, IA 52809-1675 | Oil & Gas Operator | Oct 2022 |
| 20543 | Natural Gas Systems, Inc. | | Oil & Gas Operator | Dec 2002 |
| 20544 | Natural Oil & Gas Corp | Bradford, PA 16701 | Oil & Gas Operator | Dec 2023 |
| 20545 | Natural Petroleum Company | Overton, TX 75684 | Oil & Gas Operator | Jun 1994 |
| 20546 | Natural Progression Oil & Gas Corp | Stillwater, OK 74075 | Oil & Gas Operator | Feb 2025 |
| 20547 | Natural Reserves Group, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1993 |
| 20548 | Natural Resource Corporation | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1983 |
| 20549 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 20550 | Natural Resource MGMT. Corp. | | Oil & Gas Operator | Jun 1989 |
| 20551 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |
| 20552 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2025 |
| 20553 | Nautilus Exploration LLC | Denver, CO 80218 | Oil Operator | Mar 2011 |
| 20554 | Nautilus Exploration, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Nov 2021 |
| 20555 | Nautilus Poplar LLC | Poplar, MT 59255 | Oil Operator | Jan 2025 |
| 20556 | Navajo Exploration, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Apr 2025 |
| 20557 | Navajo Nation Oil & Gas Co | Window Rock, AZ 86511 | Oil & Gas Operator | Oct 2012 |
| 20558 | Navajo Oil Company | Wichita, KS 67206 | Gas Operator | May 2011 |
| 20559 | Navalo | Rockdale, TX 76567 | Oil Operator | Apr 2025 |
| 20560 | Navarro Exploration Co., Inc. | Kingwood, TX 77345 | Oil & Gas Operator | Apr 2025 |
| 20561 | Navarro Gas Production Company | | Gas Operator | Dec 1996 |
| 20562 | Navarro Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 20563 | Navasota Resources LTD. | | Oil & Gas Operator | Sep 2002 |
| 20564 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | Jan 2025 |
| 20565 | Navidad Resources, LLC | Bullard, TX 75757 | Oil & Gas Operator | Apr 2025 |
| 20566 | Navigation Powder River LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 20567 | Navitas Land And Mineral Development, LLC | | Oil Operator | Dec 2016 |
| 20568 | Navitas Oil & Gas LLC | | Gas Operator | Dec 2012 |
| 20569 | Navitas Resources, LLC | | Oil & Gas Operator | May 2016 |
| 20570 | Navus Operating, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 20571 | Naylor Operating Company LLC | Perryton, TX 79079-9703 | Oil & Gas Operator | Sep 2012 |
| 20572 | Naylor-Pritchard | | Oil Operator | Jul 1987 |
| 20573 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Apr 2025 |
| 20574 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 20575 | NBX Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 20576 | NC Oil Company, Inc. | Humboldt, KS 66748 | Oil Operator | Dec 2024 |
| 20577 | Ncec, Inc. | Winnsboro, TX 75494 | Oil & Gas Operator | May 1994 |
| 20578 | Ncey Holdings, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2013 |
| 20579 | NCL Midstream Corp | The Woodlands, TX 77380-3105 | Oil & Gas Operator | Nov 2006 |
| 20580 | NCL Natural Resources LLC | Spring, TX 77381-5261-5261 | Oil & Gas Operator | Dec 2017 |
| 20581 | NCM Operations, Inc. | | Oil Operator | Oct 2000 |
| 20582 | NCX Company, Inc. | | Oil & Gas Operator | Aug 1999 |
| 20583 | Nea Cross Inc | Erie, PA 16508-2769 | Gas Operator | Dec 1991 |
| 20584 | Neal Lloyd Wayne | Sapulpa, OK 74066-8216 | Oil Operator | Jan 2021 |
| 20585 | Neal, Jack Engineering, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Feb 2011 |
| 20586 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Apr 2025 |
| 20587 | Neas Operating | Pampa, TX 79065 | Oil & Gas Operator | Oct 2011 |
| 20588 | Neas Operating, LLC | Wimberley, TX 78676 | Oil & Gas Operator | Apr 2025 |
| 20589 | Neatherlin, Earl Inc. | Avoca, TX 79503 | Oil & Gas Operator | Apr 2025 |
| 20590 | Nebo Operating Company | | Oil & Gas Operator | Apr 1991 |
| 20591 | Nec Operating - Kansas, LLC | Southlake, TX 76092 | Oil & Gas Operator | Dec 2024 |
| 20592 | Nec Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2025 |
| 20593 | Necessity Well Service | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 1994 |
| 20594 | Necessity Well Service, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2006 |
| 20595 | Neches Exploration, L.L.C. | Flint, TX 75762 | Oil & Gas Operator | Apr 2025 |
| 20596 | Neches Oil & Gas Company, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 20597 | Neches Transport Inc. | Spurger, TX 77660 | Oil & Gas Operator | Apr 2025 |
| 20598 | Neckers, Barry And Kathy | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 20599 | Neeb, H. L. | Abilene, TX 79606 | Oil & Gas Operator | Jul 1994 |
| 20600 | Needham Resources, Inc. | | Oil & Gas Operator | Jan 1998 |